Jove
Visualize
お問い合わせ
JoVE
x logofacebook logolinkedin logoyoutube logo
JoVEについて
概要リーダーシップブログJoVEヘルプセンター
著者向け
出版プロセス編集委員会範囲と方針査読よくある質問投稿
図書館員向け
推薦の声購読アクセスリソース図書館諮問委員会よくある質問
研究
JoVE JournalMethods CollectionsJoVE Encyclopedia of Experimentsアーカイブ
教育
JoVE CoreJoVE BusinessJoVE Science EducationJoVE Lab Manual教員リソースセンター教員サイト
利用規約
プライバシーポリシー
ポリシー

関連する概念動画

Kepler's Third Law of Planetary Motion01:18

Kepler's Third Law of Planetary Motion

3.2K
In the early 17th century, German astronomer and mathematician Johannes Kepler postulated three laws for the motion of planets in the solar system. In 1909, he formulated his first two laws based on the observations of his forebears, Nikolaus Copernicus and Tycho Brahe. However, in 1918, he published his third law of planetary motion, which gives a precise mathematical relationship between a planet's average distance from the Sun and the amount of time it takes to revolve around the Sun. It...
3.2K
Kepler's First Law of Planetary Motion01:10

Kepler's First Law of Planetary Motion

3.9K
In the early 17th century, German astronomer and mathematician Johannes Kepler postulated three laws for the motion of planets in the solar system. He formulated his first two laws based on the observations of his forebears, Nikolaus Copernicus and Tycho Brahe.
Polish astronomer Nikolaus Copernicus put forth a theory that stated a heliocentric model for the solar system. According to this heliocentric theory, all the planets, including Earth, orbit the Sun in circular orbits.
On the other hand,...
3.9K
Kepler's Second Law of Planetary Motion01:29

Kepler's Second Law of Planetary Motion

4.1K
In the early 17th century, German astronomer and mathematician Johannes Kepler postulated three laws for the motion of planets in the solar system. His first law states that all planets orbit the Sun in an elliptical orbit, with the Sun at one of the ellipse's foci. Therefore, the distance of a planet from the Sun varies throughout its revolution around the Sun.
While in an elliptical orbit, the total energy of the planet is conserved. Therefore, the planet slows down when it is at apogee and...
4.1K
Schwarzschild Radius and Event Horizon01:21

Schwarzschild Radius and Event Horizon

1.9K
No object with a finite mass can travel faster than the speed of light in a vacuum. This fact has an interesting consequence in the domain of extremely high gravitational fields.
The minimum speed required to launch a projectile from the surface of an object to which it is gravitationally bound so that it eventually escapes the object’s gravitational field is called the escape velocity. The escape velocity is independent of the mass of the object. Merging the idea of escape...
1.9K
Reduced Mass Coordinates: Isolated Two-body Problem01:12

Reduced Mass Coordinates: Isolated Two-body Problem

1.2K
In classical mechanics, the two-body problem is one of the fundamental problems describing the motion of two interacting bodies under gravity or any other central force. When considering the motion of two bodies, one of the most important concepts is the reduced mass coordinates, a quantity that allows the two-body problem to be solved like a single-body problem. In these circumstances, it is assumed that a single body with reduced mass revolves around another body fixed in a position with an...
1.2K
Detection of Black Holes01:10

Detection of Black Holes

2.2K
Although black holes were theoretically postulated in the 1920s, they remained outside the domain of observational astronomy until the 1970s.
Their closest cousins are neutron stars, which are composed almost entirely of neutrons packed against each other, making them extremely dense. A neutron star has the same mass as the Sun but its diameter is only a few kilometers. Therefore, the escape velocity from their surface is close to the speed of light.
Not until the 1960s, when the first neutron...
2.2K

こちらも読む

関連記事

共著者、ジャーナル、引用グラフによってこの研究に関連する記事。

並び替え
Same author

A distant brown dwarf coplanar to a warm Jupiter and a hot super-Earth.

Nature·2026
Same author

Multiple outflows and delayed ejections revealed by early imaging of novae.

Nature astronomy·2026
Same author

The ro-vibrational spectroscopy of H2NCO (2A') and HNCOH and the peculiar case of their isomers cis- and trans-HNCHO.

The Journal of chemical physics·2026
Same author

A second planetesimal collision in the Fomalhaut system.

Science (New York, N.Y.)·2025
Same author

Large-amplitude variability driven by giant dust storms on a planetary-mass companion.

Science advances·2025
Same author

How to understand exoplanets - space scientists call on lab-based chemists to help.

Nature·2025

関連する実験動画

Updated: Jun 10, 2025

The Generation of Higher-order Laguerre-Gauss Optical Beams for High-precision Interferometry
12:14

The Generation of Higher-order Laguerre-Gauss Optical Beams for High-precision Interferometry

Published on: August 12, 2013

21.7K

涼しいブラウン・ダワーヌ Gliese 229 B は,密接なバイナリである

Jerry W Xuan1, A Mérand2, W Thompson3

  • 1Department of Astronomy, California Institute of Technology, Pasadena, CA, USA. wxuan@caltech.edu.

Nature
|October 16, 2024
PubMed
まとめ

巨大な惑星に似た ブラウン・ダワーフが 恒星の形成理論に 異議を唱えています 観測により,Gliese 229Bは実際にはGliese 229BaBbという二重星系であり,二重の茶色矮星形成に関する不一致を解決し,新しい疑問を提起しています.

さらに関連する動画

Cooling an Optically Trapped Ultracold Fermi Gas by Periodical Driving
11:21

Cooling an Optically Trapped Ultracold Fermi Gas by Periodical Driving

Published on: March 30, 2017

7.4K
Surface Mapping of Earth-like Exoplanets using Single Point Light Curves
06:48

Surface Mapping of Earth-like Exoplanets using Single Point Light Curves

Published on: May 10, 2020

3.5K

関連する実験動画

Last Updated: Jun 10, 2025

The Generation of Higher-order Laguerre-Gauss Optical Beams for High-precision Interferometry
12:14

The Generation of Higher-order Laguerre-Gauss Optical Beams for High-precision Interferometry

Published on: August 12, 2013

21.7K
Cooling an Optically Trapped Ultracold Fermi Gas by Periodical Driving
11:21

Cooling an Optically Trapped Ultracold Fermi Gas by Periodical Driving

Published on: March 30, 2017

7.4K
Surface Mapping of Earth-like Exoplanets using Single Point Light Curves
06:48

Surface Mapping of Earth-like Exoplanets using Single Point Light Curves

Published on: May 10, 2020

3.5K

科学分野:

  • 天文学と天体物理学
  • 外惑星科学
  • 恒星と亜恒星物体の形成

背景:

  • ブラウン・ダワーフの伴星は 巨大系外惑星との類似性により 惑星の形成と進化の洞察を 提供しています
  • いくつかの茶色矮星は,輝度と宿主星の年齢によって予測されるよりも大きいので,不完全な理論または複数の構成要素を示唆しています.

研究 の 目的:

  • 理論的な予測と観測されたブラウン・ダワーンの同伴星,特にグリーゼ229Bの質量の差異を調査する.
  • 明らかに単一の物体である Gliese 229B を構成要素に分解する.

主な方法:

  • GRAVITYインターフェロメーターを用いたGliese 229Bの観測.
  • 非常に大きな望遠鏡のCRIRES+スペクトログラフを用いた独立した観測.

主要な成果:

  • 両方の観測群は,Gliese 229BをGliese 229BaとGliese 229Bbの2つの構成要素に分解した.
  • 構成要素の質量はそれぞれ38.1 ± 1.0と34.4 ± 1.5の木星質量 (MJup) である.
  • 周回周期は12.1日,半大軸は0.042AUである.

結論:

  • グリーゼ229BaBbという二重の茶色矮星系の発見は,理論的モデルと観測データとの矛盾を解決した.
  • この発見は,恒星の周りのコンパクトな二重ブラウン・ダワーシステムの形成メカニズムと流行に関する新しい疑問を投げかけます.